I agree with what the two people above me said. Though it's not really recommended, I think you'll like liquid cooling enough you'll change out some parts before any corrosion damage can be done. And with a decent corrosion inhibitor it should hold up pretty well.
The reason we don't recommend aluminium+copper even with a good inhibitor is because though there are numerous cases where there wasn't a problem at all, there have been cases where problems did occur, and we're trying to prevent people from getting the problem at all.